After running for just 40 yards in the 49ers loss to the Seattle Seahawks, Carlos Hyde was asked to confirm whether he s coping with a stress fracture in his left foot, to which he replied: Something like that.

Hyde, who sustained the injury in an Oct. 11 loss to the New York Giants, was unsure whether he s risking further injury by playing.

Anything can happen in a football game, Hyde said. I could go out and, God forbid, I could break a leg.

He said his pain Thursday night registered a 6 on a scale of 10. Coach Jim Tomsula would only say that Hyde has a foot issue and wouldn’t specify its severity.

I ll take it day to day, stay off it as much as possible and rest,” Hyde said.

The 49ers (2-5) have a few extra days rest as they won t play again until Nov. 1, at St. Louis (2-3).

To help lessen Hyde s load, the 49ers welcomed back Reggie Bush from a calf injury. Bush had four carries for 21 yards and three receptions for 13 yards, mostly on plays in which the 49ers were merely surrendering to set up punts.

Bush s first action didn t go well, as he dropped a third-down pass on the opening series that looked headed for a first-down conversion. He later had a four-yard reception that came up 14 yards short of a first down.

The 49ers also deployed Bush to return punts for the first time since 2011, though the Seahawks first punt was downed without Bush touching it.

The 49ers opted for Mike Davis over fellow rookie Jarryd Hayne to serve as the third-string running back. Hayne didn t touch the ball on offense in three of the previous four games, and he s played only 28 snaps, totaling only 8 carries for 25 yards and a 7-yard reception.

Hayne, however, had been entrenched as the punt returner since a 37-yard effort sparked the 49ers only touchdown in a 47-7 loss at Arizona in Week 3. However, Hayne fumbled on his only return in Sunday’s win over the Baltimore Ravens, and he muffed punts in each of the 49ers other two home games.

— Safety Antoine Bethea sustained a second-quarter shoulder injury, possibly on the same play he drew a 15-yard, facemask penalty while tackling Doug Baldwin. The Seahawks Tyler Lockett caught a 43-yard touchdown on the ensuing snap.

Jaquiski Tartt replaced Bethea for the second half. He s the next man up and he s got to play like Bethea, said cornerback Tramaine Brock, noting he was unaware of the severity of Bethea s injury. Tartt sustained a bruised shin in the fourth quarter when he collided with teammate Jimmie Ward.

— Unlike last Thanksgiving s home loss to the Seahawks, 49ers CEO Jed York did not tweet an apology to fans. Wide receiver Torrey Smith, however, did chime in on Twitter: Unacceptable. That was sorry.